וַיִּשְׁלַ֤ח סְפָרִים֙ אֶל־כָּל־מְדִינ֣וֹת הַמֶּ֔לֶךְ אֶל־מְדִינָ֤ה וּמְדִינָה֙ כִּכְתָבָ֔הּ וְאֶל־עַ֥ם וָעָ֖ם כִּלְשׁוֹנ֑וֹ לִהְי֤וֹת כָּל־אִישׁ֙ שֹׂרֵ֣ר בְּבֵית֔וֹ וּמְדַבֵּ֖ר כִּלְשׁ֥וֹן עַמּֽוֹ׃ (פ)
און ער האָט געשיקט בריװ צו אַלע מדינות פֿון דעם מלך, צו איטלעכער מדינה לױט איר כּתב, און צו איטלעכן פֿאָלק לױט זײַן לשון, אַז יעטװעדער מאַן זאָל זײַן דער הערשער אין זײַן הױז, און רעדן אַזױ װי דער לשון פֿון זײַן פֿאָלק.
Tze'enah Ure'enah
“So that every man will rule in his own house” [1:22]. He wrote letters to all the lands that each man should rule in his house and the wife should not have dominion over her husband, so that what happened to Vashti should not happen to her.
Tze'enah Ure'enah
“And should speak the language of his own people” [1:22]. The wife should speak the same language as the husband speaks.23Yalkut Shimoni, Esther, Remez 1051.
Rashi
And his people’s language be the one spoken. He can compel his wife to learn his language if her native tongue is different.33Ibid. 4:12. The purpose for this law was to make wives show respect and subjugation to their husbands.